Non-diffractive Bessel-Gauss beams for the detection of rotating object free of obstructions

被引：111

作者：

Fu, Shiyao ^{[1
]}

Wang, Tonglu ^{[2
]}

Zhang, Zheyuan ^{[1
]}

Zhai, Yanwang ^{[1
]}

Gao, Chunqing ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Optoelect, Beijing 100081, Peoples R China

[2] Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 17期

关键词：

ORBITAL-ANGULAR-MOMENTUM; PERFECT POLARIZATION VORTICES; POYNTING VECTOR; FREQUENCY-SHIFT; FLOW VORTICITY; GENERATION; VORTEX; LIGHT; TRANSFORMATION; MODES;

D O I：

10.1364/OE.25.020098

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Bessel-Gauss beams carrying orbital angular momentum are widely known for their non-diffractive or self-reconstructing performance, and have been applied in lots of domains. Here we demonstrate that, by illuminating a rotating object with high-order Bessel-Gauss beams, a frequency shift proportional to the rotating speed and the topological charge is observed. Moreover, the frequency shift is still present once an obstacle exists in the path, in spite of the decreasing of received signals. Our work indicates the feasibility of detecting rotating objects free of obstructions, and has potential as obstruction-immune rotation sensors in engine monitoring, aerological sounding, and so on. (C) 2017 Optical Society of America

引用

页码：20098 / 20108

页数：11

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